import { Component, AfterViewInit, OnDestroy, ViewChild } from '@angular/core';
import {
  ChartComponent,
  ApexAxisChartSeries,
  ApexNonAxisChartSeries,
  ApexChart,
  ApexXAxis,
  ApexYAxis,
  ApexTitleSubtitle,
  ApexDataLabels,
  ApexStroke,
  ApexFill,
  ApexLegend,
  ApexTooltip,
  ApexMarkers,
  ApexPlotOptions,
  ApexResponsive,
  ApexGrid,
  ApexAnnotations,
  ApexStates,
  ApexTheme,
  NgApexchartsModule,
} from 'ng-apexcharts';

export type ChartOptions = {
  series?: ApexAxisChartSeries | ApexNonAxisChartSeries;
  chart?: ApexChart;
  xaxis?: ApexXAxis;
  yaxis?: ApexYAxis | ApexYAxis[];
  title?: ApexTitleSubtitle;
  subtitle?: ApexTitleSubtitle;
  dataLabels?: ApexDataLabels;
  stroke?: ApexStroke;
  fill?: ApexFill;
  legend?: ApexLegend;
  tooltip?: ApexTooltip;
  markers?: ApexMarkers;
  plotOptions?: ApexPlotOptions;
  responsive?: ApexResponsive[];
  grid?: ApexGrid;
  annotations?: ApexAnnotations;
  states?: ApexStates;
  theme?: ApexTheme;
  colors?: string[];
  labels?: any;
};

@Component({
  selector: 'app-chart',
  standalone: true,
  imports: [NgApexchartsModule],
  templateUrl: './chart.component.html',
})
export class AppChart implements AfterViewInit, OnDestroy {
  @ViewChild('chart') chart!: ChartComponent;
  private mulberry32 = (a: any): any => {
          return function () {
            a |= 0
            a = (a + 0x6d2b79f5) | 0
            var t = Math.imul(a ^ (a >>> 15), 1 | a)
            t = (t + Math.imul(t ^ (t >>> 7), 61 | t)) ^ t
            return ((t ^ (t >>> 14)) >>> 0) / 4294967296
          }
        };

  private rng: any = this.mulberry32(24681012);

  private gauss = (mean: any, sd: any): any => {
          var u = 0,
            v = 0
          while (u === 0) u = this.rng()
          while (v === 0) v = this.rng()
          return mean + sd * Math.sqrt(-2 * Math.log(u)) * Math.cos(2 * Math.PI * v)
        };

  private bimodal = (n: any, a: any, b: any): any => {
          var out = []
          for (var i = 0; i < n; i++) {
            var c = this.rng() < a.w ? a : b
            out.push(Math.max(0, Math.round(this.gauss(c.mean, c.sd) * 10) / 10))
          }
          return out
        };

  private CHANNELS: any = [
          {
            name: 'Direct',
            data: this.bimodal(320, { w: 0.4, mean: 2, sd: 1 }, { mean: 22, sd: 5 }),
          },
          {
            name: 'Search',
            data: this.bimodal(320, { w: 0.55, mean: 2, sd: 1 }, { mean: 18, sd: 5 }),
          },
          {
            name: 'Social',
            data: this.bimodal(320, { w: 0.7, mean: 2, sd: 1 }, { mean: 14, sd: 4 }),
          },
          {
            name: 'Email',
            data: this.bimodal(320, { w: 0.3, mean: 3, sd: 1.5 }, { mean: 26, sd: 6 }),
          },
        ];

  private kde = (values: any, bw: any, step: any): any => {
          var min = Math.min.apply(null, values) - bw
          var max = Math.max.apply(null, values) + bw
          var N = values.length
          var profile = []
          for (var x = min; x <= max; x += step) {
            var sum = 0
            for (var k = 0; k < N; k++) {
              var d = (x - values[k]) / bw
              sum += Math.exp(-0.5 * d * d)
            }
            profile.push([Math.round(x * 100) / 100, sum / (N * bw)])
          }
          return profile
        };

  public chartOptions: Partial<ChartOptions> = {
          series: [
            {
              name: 'Sessions',
              data: this.CHANNELS.map(function (c) {
                return {
                  x: c.name,
                  y: { density: this.kde(c.data, 2.5, 1.5), points: c.data },
                }
              }),
            },
          ],
          chart: {
            type: 'violin',
            height: 480,
          },
          title: {
            text: 'Session duration by channel',
          },
          plotOptions: {
            bar: {
              horizontal: true,
              distributed: true,
            },
            violin: {
              normalize: 'group',
              points: { show: false }, // density curves only
            },
          },
          colors: ['#0ea5e9', '#8b5cf6', '#f97316', '#10b981'],
          stroke: { width: 1, colors: ['#888'] },
          legend: { show: false },
          xaxis: {
            title: { text: 'Session duration (minutes)' },
          },
        };
  ngAfterViewInit() {
    (window as any).ApexCharts.setLicense('APEX-eyJpc3N1ZURhdGUiOiIyMDI2LTA0LTE2IiwiZXhwaXJ5RGF0ZSI6IjIwNTItMDQtMTciLCJwbGFuIjoiZW50ZXJwcmlzZSIsImRvbWFpbnMiOlsiYXBleGNoYXJ0cy5jb20iLCIxMjcuMC4wLjEiXX0=');
  }

  ngOnDestroy() {
    // no cleanup needed
  }
}